The reason for not closing deals on the date specified for the official closing, is that it is possible that the open deals can achieve more profits, or compensate for a loss, and therefore closing them may lead to material losses to the trader, or miss profitable opportunities that could have been The forex market can be open after the main trading hours through the web platforms that make it available for trading 24 hours a day.
The rollover process is seen by some as being associated with usurious interest because the interest rate of currencies is included in the calculation process for this commission, while others do not see it as a usurious interest, but rather a commission in exchange for the service to extend the life of the commercial contract.
The calculation is performed as follows:
Swap = One Point / Exchange Rate * Lot Size * Swap Value in Points, Example:
One Point: 0.00001
Account Base Currency: EUR
Currency Pair: EUR/USD
Exchange Rate: 1.0895 (EUR/USD)
Lot Size: 5.00 (1 standard lot = 100,000 units)
Short overnight commission rate: 0.15
Overnight commission = (0.00001 / 1.0895) * (500,000 * 0.15)
the value of the rollover commission is 0.69 EUR
If the result is negative, your account will be debited, while if it is positive, it will be added to your account.